Add some utilities to manipulate the reserved memory map.

[u-boot] / libfdt / fdt_wip.c

diff --git a/libfdt/fdt_wip.c b/libfdt/fdt_wip.c
index 261b9b0dc9379f714fd00ea2a0806d065a269336..cf811830a73bdba81b71239940fcd958f8b6d89a 100644 (file)
--- a/libfdt/fdt_wip.c
+++ b/libfdt/fdt_wip.c
@@ -110,3 +110,29 @@ int fdt_nop_node(void *fdt, int nodeoffset)
        nop_region(fdt_offset_ptr(fdt, nodeoffset, 0), endoffset - nodeoffset);
        return 0;
 }
+
+/*
+ * Replace a reserve map entry in the nth slot.
+ */
+int fdt_replace_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size)
+{
+       struct fdt_reserve_entry *re;
+       int  used;
+       int  total;
+       int  err;
+
+       err = fdt_num_reservemap(fdt, &used, &total);
+       if (err != 0)
+               return err;
+
+       if (n >= total)
+               return -FDT_ERR_NOSPACE;
+       re = (struct fdt_reserve_entry *)
+               (fdt + fdt_off_mem_rsvmap(fdt) +
+                (n * sizeof(struct fdt_reserve_entry)));
+       re->address = cpu_to_fdt64(addr);
+       re->size    = cpu_to_fdt64(size);
+
+       return 0;
+}
+